Question: On December 28, 1946, who did Aristotle Onassis marry?
Paraphrase: who did Aristotle Onassis marry on December 28, 1946
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q180455 p:P26 ?s . ?s ps:P26 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1946')) }